[PATCH v1 2/4] perf test: Don't leak workload gopipe in PERF_RECORD_*

Ian Rogers posted 4 patches 1 month, 1 week ago
There is a newer version of this series
[PATCH v1 2/4] perf test: Don't leak workload gopipe in PERF_RECORD_*
Posted by Ian Rogers 1 month, 1 week ago
The test starts a workload and then opens events. If the events fail
to open, for example because of perf_event_paranoid, the gopipe of the
workload is leaked and the file descriptor leak check fails when the
test exits. To avoid this cancel the workload when opening the events
fails.

Before:
```
$ perf test -vv 7
  7: PERF_RECORD_* events & perf_sample fields:
--- start ---
test child forked, pid 1189568
Using CPUID GenuineIntel-6-B7-1
------------------------------------------------------------
perf_event_attr:
  type                             0 (PERF_TYPE_HARDWARE)
  config                           0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                         1
------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8
sys_perf_event_open failed, error -13
------------------------------------------------------------
perf_event_attr:
  type                             0 (PERF_TYPE_HARDWARE)
  config                           0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                         1
  exclude_kernel                   1
------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 3
------------------------------------------------------------
perf_event_attr:
  type                             0 (PERF_TYPE_HARDWARE)
  config                           0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                         1
------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8
sys_perf_event_open failed, error -13
------------------------------------------------------------
perf_event_attr:
  type                             0 (PERF_TYPE_HARDWARE)
  config                           0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                         1
  exclude_kernel                   1
------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 3
Attempt to add: software/cpu-clock/
..after resolving event: software/config=0/
cpu-clock -> software/cpu-clock/
------------------------------------------------------------
perf_event_attr:
  type                             1 (PERF_TYPE_SOFTWARE)
  size                             136
  config                           0x9 (PERF_COUNT_SW_DUMMY)
  sample_type                      IP|TID|TIME|CPU
  read_format                      ID|LOST
  disabled                         1
  inherit                          1
  mmap                             1
  comm                             1
  enable_on_exec                   1
  task                             1
  sample_id_all                    1
  mmap2                            1
  comm_exec                        1
  ksymbol                          1
  bpf_event                        1
  { wakeup_events, wakeup_watermark } 1
------------------------------------------------------------
sys_perf_event_open: pid 1189569  cpu 0  group_fd -1  flags 0x8
sys_perf_event_open failed, error -13
perf_evlist__open: Permission denied
---- end(-2) ----
Leak of file descriptor 6 that opened: 'pipe:[14200347]'

---- unexpected signal (6) ----
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
Failed to read build ID for //anon
    #0 0x565358f6666e in child_test_sig_handler builtin-test.c:311
    #1 0x7f29ce849df0 in __restore_rt libc_sigaction.c:0
    #2 0x7f29ce89e95c in __pthread_kill_implementation pthread_kill.c:44
    #3 0x7f29ce849cc2 in raise raise.c:27
    #4 0x7f29ce8324ac in abort abort.c:81
    #5 0x565358f662d4 in check_leaks builtin-test.c:226
    #6 0x565358f6682e in run_test_child builtin-test.c:344
    #7 0x565358ef7121 in start_command run-command.c:128
    #8 0x565358f67273 in start_test builtin-test.c:545
    #9 0x565358f6771d in __cmd_test builtin-test.c:647
    #10 0x565358f682bd in cmd_test builtin-test.c:849
    #11 0x565358ee5ded in run_builtin perf.c:349
    #12 0x565358ee6085 in handle_internal_command perf.c:401
    #13 0x565358ee61de in run_argv perf.c:448
    #14 0x565358ee6527 in main perf.c:555
    #15 0x7f29ce833ca8 in __libc_start_call_main libc_start_call_main.h:74
    #16 0x7f29ce833d65 in __libc_start_main@@GLIBC_2.34 libc-start.c:128
    #17 0x565358e391c1 in _start perf[851c1]
  7: PERF_RECORD_* events & perf_sample fields                       : FAILED!
```

After:
```
$ perf test 7
  7: PERF_RECORD_* events & perf_sample fields                       : Skip (permissions)
```

Fixes: 16d00fee7038 ("perf tests: Move test__PERF_RECORD into separate object")
Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/tests/perf-record.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 0b3c37e66871..8c79b5166a05 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -115,6 +115,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
 	if (err < 0) {
 		pr_debug("sched__get_first_possible_cpu: %s\n",
 			 str_error_r(errno, sbuf, sizeof(sbuf)));
+		evlist__cancel_workload(evlist);
 		goto out_delete_evlist;
 	}
 
@@ -126,6 +127,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
 	if (sched_setaffinity(evlist->workload.pid, cpu_mask_size, &cpu_mask) < 0) {
 		pr_debug("sched_setaffinity: %s\n",
 			 str_error_r(errno, sbuf, sizeof(sbuf)));
+		evlist__cancel_workload(evlist);
 		goto out_delete_evlist;
 	}
 
@@ -137,6 +139,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
 	if (err < 0) {
 		pr_debug("perf_evlist__open: %s\n",
 			 str_error_r(errno, sbuf, sizeof(sbuf)));
+		evlist__cancel_workload(evlist);
 		goto out_delete_evlist;
 	}
 
@@ -149,6 +152,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
 	if (err < 0) {
 		pr_debug("evlist__mmap: %s\n",
 			 str_error_r(errno, sbuf, sizeof(sbuf)));
+		evlist__cancel_workload(evlist);
 		goto out_delete_evlist;
 	}
 
-- 
2.51.0.rc2.233.g662b1ed5c5-goog
Re: [PATCH v1 2/4] perf test: Don't leak workload gopipe in PERF_RECORD_*
Posted by Arnaldo Carvalho de Melo 2 weeks, 3 days ago
On Thu, Aug 21, 2025 at 03:18:32PM -0700, Ian Rogers wrote:
> The test starts a workload and then opens events. If the events fail
> to open, for example because of perf_event_paranoid, the gopipe of the
> workload is leaked and the file descriptor leak check fails when the
> test exits. To avoid this cancel the workload when opening the events
> fails.
> 
> Before:
> ```
> $ perf test -vv 7
>   7: PERF_RECORD_* events & perf_sample fields:
> --- start ---

⬢ [acme@toolbx perf-tools-next]$ patch -p1 < b
patching file tools/perf/tests/perf-record.c
Hunk #1 succeeded at 130 (offset 15 lines).
Hunk #2 succeeded at 142 with fuzz 1 (offset 15 lines).
Hunk #3 succeeded at 154 (offset 15 lines).
Hunk #4 succeeded at 167 (offset 15 lines).
⬢ [acme@toolbx perf-tools-next]$ 
⬢ [acme@toolbx perf-tools-next]$ git log --oneline -5 tools/perf/tests/perf-record.c
576bd7a8c90c48e9 (x1/perf-tools-next, x1/HEAD, five/perf-tools-next, five/HEAD) perf tests record: Update testcase to fix usage of affinity for machines with #CPUs > 1K
b4c658d4d63d6149 perf target: Remove uid from target
dc6d2bc2d893a878 perf sample: Make user_regs and intr_regs optional
fd8d5a3b076c033f perf tests: Add missing event.h include
9823147da6c893d9 perf tools: Move 'struct perf_sample' to a separate header file to disentangle headers
⬢ [acme@toolbx perf-tools-next]$

Can you please check that it is still ok?

I processed the first in the series and now I'm going thru the other
two.

- Arnaldo

> test child forked, pid 1189568
> Using CPUID GenuineIntel-6-B7-1
> ------------------------------------------------------------
> perf_event_attr:
>   type                             0 (PERF_TYPE_HARDWARE)
>   config                           0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/)
>   disabled                         1
> ------------------------------------------------------------
> sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8
> sys_perf_event_open failed, error -13
> ------------------------------------------------------------
> perf_event_attr:
>   type                             0 (PERF_TYPE_HARDWARE)
>   config                           0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/)
>   disabled                         1
>   exclude_kernel                   1
> ------------------------------------------------------------
> sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 3
> ------------------------------------------------------------
> perf_event_attr:
>   type                             0 (PERF_TYPE_HARDWARE)
>   config                           0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/)
>   disabled                         1
> ------------------------------------------------------------
> sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8
> sys_perf_event_open failed, error -13
> ------------------------------------------------------------
> perf_event_attr:
>   type                             0 (PERF_TYPE_HARDWARE)
>   config                           0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/)
>   disabled                         1
>   exclude_kernel                   1
> ------------------------------------------------------------
> sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 3
> Attempt to add: software/cpu-clock/
> ..after resolving event: software/config=0/
> cpu-clock -> software/cpu-clock/
> ------------------------------------------------------------
> perf_event_attr:
>   type                             1 (PERF_TYPE_SOFTWARE)
>   size                             136
>   config                           0x9 (PERF_COUNT_SW_DUMMY)
>   sample_type                      IP|TID|TIME|CPU
>   read_format                      ID|LOST
>   disabled                         1
>   inherit                          1
>   mmap                             1
>   comm                             1
>   enable_on_exec                   1
>   task                             1
>   sample_id_all                    1
>   mmap2                            1
>   comm_exec                        1
>   ksymbol                          1
>   bpf_event                        1
>   { wakeup_events, wakeup_watermark } 1
> ------------------------------------------------------------
> sys_perf_event_open: pid 1189569  cpu 0  group_fd -1  flags 0x8
> sys_perf_event_open failed, error -13
> perf_evlist__open: Permission denied
> ---- end(-2) ----
> Leak of file descriptor 6 that opened: 'pipe:[14200347]'
> 
> ---- unexpected signal (6) ----
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
> Failed to read build ID for //anon
>     #0 0x565358f6666e in child_test_sig_handler builtin-test.c:311
>     #1 0x7f29ce849df0 in __restore_rt libc_sigaction.c:0
>     #2 0x7f29ce89e95c in __pthread_kill_implementation pthread_kill.c:44
>     #3 0x7f29ce849cc2 in raise raise.c:27
>     #4 0x7f29ce8324ac in abort abort.c:81
>     #5 0x565358f662d4 in check_leaks builtin-test.c:226
>     #6 0x565358f6682e in run_test_child builtin-test.c:344
>     #7 0x565358ef7121 in start_command run-command.c:128
>     #8 0x565358f67273 in start_test builtin-test.c:545
>     #9 0x565358f6771d in __cmd_test builtin-test.c:647
>     #10 0x565358f682bd in cmd_test builtin-test.c:849
>     #11 0x565358ee5ded in run_builtin perf.c:349
>     #12 0x565358ee6085 in handle_internal_command perf.c:401
>     #13 0x565358ee61de in run_argv perf.c:448
>     #14 0x565358ee6527 in main perf.c:555
>     #15 0x7f29ce833ca8 in __libc_start_call_main libc_start_call_main.h:74
>     #16 0x7f29ce833d65 in __libc_start_main@@GLIBC_2.34 libc-start.c:128
>     #17 0x565358e391c1 in _start perf[851c1]
>   7: PERF_RECORD_* events & perf_sample fields                       : FAILED!
> ```
> 
> After:
> ```
> $ perf test 7
>   7: PERF_RECORD_* events & perf_sample fields                       : Skip (permissions)
> ```
> 
> Fixes: 16d00fee7038 ("perf tests: Move test__PERF_RECORD into separate object")
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
>  tools/perf/tests/perf-record.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
> index 0b3c37e66871..8c79b5166a05 100644
> --- a/tools/perf/tests/perf-record.c
> +++ b/tools/perf/tests/perf-record.c
> @@ -115,6 +115,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
>  	if (err < 0) {
>  		pr_debug("sched__get_first_possible_cpu: %s\n",
>  			 str_error_r(errno, sbuf, sizeof(sbuf)));
> +		evlist__cancel_workload(evlist);
>  		goto out_delete_evlist;
>  	}
>  
> @@ -126,6 +127,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
>  	if (sched_setaffinity(evlist->workload.pid, cpu_mask_size, &cpu_mask) < 0) {
>  		pr_debug("sched_setaffinity: %s\n",
>  			 str_error_r(errno, sbuf, sizeof(sbuf)));
> +		evlist__cancel_workload(evlist);
>  		goto out_delete_evlist;
>  	}
>  
> @@ -137,6 +139,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
>  	if (err < 0) {
>  		pr_debug("perf_evlist__open: %s\n",
>  			 str_error_r(errno, sbuf, sizeof(sbuf)));
> +		evlist__cancel_workload(evlist);
>  		goto out_delete_evlist;
>  	}
>  
> @@ -149,6 +152,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
>  	if (err < 0) {
>  		pr_debug("evlist__mmap: %s\n",
>  			 str_error_r(errno, sbuf, sizeof(sbuf)));
> +		evlist__cancel_workload(evlist);
>  		goto out_delete_evlist;
>  	}
>  
> -- 
> 2.51.0.rc2.233.g662b1ed5c5-goog
Re: [PATCH v1 2/4] perf test: Don't leak workload gopipe in PERF_RECORD_*
Posted by Ian Rogers 2 weeks, 3 days ago
On Tue, Sep 16, 2025 at 12:04 PM Arnaldo Carvalho de Melo
<acme@kernel.org> wrote:
>
> On Thu, Aug 21, 2025 at 03:18:32PM -0700, Ian Rogers wrote:
> > The test starts a workload and then opens events. If the events fail
> > to open, for example because of perf_event_paranoid, the gopipe of the
> > workload is leaked and the file descriptor leak check fails when the
> > test exits. To avoid this cancel the workload when opening the events
> > fails.
> >
> > Before:
> > ```
> > $ perf test -vv 7
> >   7: PERF_RECORD_* events & perf_sample fields:
> > --- start ---
>
> ⬢ [acme@toolbx perf-tools-next]$ patch -p1 < b
> patching file tools/perf/tests/perf-record.c
> Hunk #1 succeeded at 130 (offset 15 lines).
> Hunk #2 succeeded at 142 with fuzz 1 (offset 15 lines).
> Hunk #3 succeeded at 154 (offset 15 lines).
> Hunk #4 succeeded at 167 (offset 15 lines).
> ⬢ [acme@toolbx perf-tools-next]$
> ⬢ [acme@toolbx perf-tools-next]$ git log --oneline -5 tools/perf/tests/perf-record.c
> 576bd7a8c90c48e9 (x1/perf-tools-next, x1/HEAD, five/perf-tools-next, five/HEAD) perf tests record: Update testcase to fix usage of affinity for machines with #CPUs > 1K
> b4c658d4d63d6149 perf target: Remove uid from target
> dc6d2bc2d893a878 perf sample: Make user_regs and intr_regs optional
> fd8d5a3b076c033f perf tests: Add missing event.h include
> 9823147da6c893d9 perf tools: Move 'struct perf_sample' to a separate header file to disentangle headers
> ⬢ [acme@toolbx perf-tools-next]$
>
> Can you please check that it is still ok?
>
> I processed the first in the series and now I'm going thru the other
> two.

Thanks Arnaldo! I'm not seeing the patch on:
https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/log/?h=tmp.perf-tools-next
I'm happy to check.

Ian

> - Arnaldo
>
> > test child forked, pid 1189568
> > Using CPUID GenuineIntel-6-B7-1
> > ------------------------------------------------------------
> > perf_event_attr:
> >   type                             0 (PERF_TYPE_HARDWARE)
> >   config                           0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/)
> >   disabled                         1
> > ------------------------------------------------------------
> > sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8
> > sys_perf_event_open failed, error -13
> > ------------------------------------------------------------
> > perf_event_attr:
> >   type                             0 (PERF_TYPE_HARDWARE)
> >   config                           0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/)
> >   disabled                         1
> >   exclude_kernel                   1
> > ------------------------------------------------------------
> > sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 3
> > ------------------------------------------------------------
> > perf_event_attr:
> >   type                             0 (PERF_TYPE_HARDWARE)
> >   config                           0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/)
> >   disabled                         1
> > ------------------------------------------------------------
> > sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8
> > sys_perf_event_open failed, error -13
> > ------------------------------------------------------------
> > perf_event_attr:
> >   type                             0 (PERF_TYPE_HARDWARE)
> >   config                           0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/)
> >   disabled                         1
> >   exclude_kernel                   1
> > ------------------------------------------------------------
> > sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 3
> > Attempt to add: software/cpu-clock/
> > ..after resolving event: software/config=0/
> > cpu-clock -> software/cpu-clock/
> > ------------------------------------------------------------
> > perf_event_attr:
> >   type                             1 (PERF_TYPE_SOFTWARE)
> >   size                             136
> >   config                           0x9 (PERF_COUNT_SW_DUMMY)
> >   sample_type                      IP|TID|TIME|CPU
> >   read_format                      ID|LOST
> >   disabled                         1
> >   inherit                          1
> >   mmap                             1
> >   comm                             1
> >   enable_on_exec                   1
> >   task                             1
> >   sample_id_all                    1
> >   mmap2                            1
> >   comm_exec                        1
> >   ksymbol                          1
> >   bpf_event                        1
> >   { wakeup_events, wakeup_watermark } 1
> > ------------------------------------------------------------
> > sys_perf_event_open: pid 1189569  cpu 0  group_fd -1  flags 0x8
> > sys_perf_event_open failed, error -13
> > perf_evlist__open: Permission denied
> > ---- end(-2) ----
> > Leak of file descriptor 6 that opened: 'pipe:[14200347]'
> >
> > ---- unexpected signal (6) ----
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> > Failed to read build ID for //anon
> >     #0 0x565358f6666e in child_test_sig_handler builtin-test.c:311
> >     #1 0x7f29ce849df0 in __restore_rt libc_sigaction.c:0
> >     #2 0x7f29ce89e95c in __pthread_kill_implementation pthread_kill.c:44
> >     #3 0x7f29ce849cc2 in raise raise.c:27
> >     #4 0x7f29ce8324ac in abort abort.c:81
> >     #5 0x565358f662d4 in check_leaks builtin-test.c:226
> >     #6 0x565358f6682e in run_test_child builtin-test.c:344
> >     #7 0x565358ef7121 in start_command run-command.c:128
> >     #8 0x565358f67273 in start_test builtin-test.c:545
> >     #9 0x565358f6771d in __cmd_test builtin-test.c:647
> >     #10 0x565358f682bd in cmd_test builtin-test.c:849
> >     #11 0x565358ee5ded in run_builtin perf.c:349
> >     #12 0x565358ee6085 in handle_internal_command perf.c:401
> >     #13 0x565358ee61de in run_argv perf.c:448
> >     #14 0x565358ee6527 in main perf.c:555
> >     #15 0x7f29ce833ca8 in __libc_start_call_main libc_start_call_main.h:74
> >     #16 0x7f29ce833d65 in __libc_start_main@@GLIBC_2.34 libc-start.c:128
> >     #17 0x565358e391c1 in _start perf[851c1]
> >   7: PERF_RECORD_* events & perf_sample fields                       : FAILED!
> > ```
> >
> > After:
> > ```
> > $ perf test 7
> >   7: PERF_RECORD_* events & perf_sample fields                       : Skip (permissions)
> > ```
> >
> > Fixes: 16d00fee7038 ("perf tests: Move test__PERF_RECORD into separate object")
> > Signed-off-by: Ian Rogers <irogers@google.com>
> > ---
> >  tools/perf/tests/perf-record.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
> > index 0b3c37e66871..8c79b5166a05 100644
> > --- a/tools/perf/tests/perf-record.c
> > +++ b/tools/perf/tests/perf-record.c
> > @@ -115,6 +115,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> >       if (err < 0) {
> >               pr_debug("sched__get_first_possible_cpu: %s\n",
> >                        str_error_r(errno, sbuf, sizeof(sbuf)));
> > +             evlist__cancel_workload(evlist);
> >               goto out_delete_evlist;
> >       }
> >
> > @@ -126,6 +127,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> >       if (sched_setaffinity(evlist->workload.pid, cpu_mask_size, &cpu_mask) < 0) {
> >               pr_debug("sched_setaffinity: %s\n",
> >                        str_error_r(errno, sbuf, sizeof(sbuf)));
> > +             evlist__cancel_workload(evlist);
> >               goto out_delete_evlist;
> >       }
> >
> > @@ -137,6 +139,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> >       if (err < 0) {
> >               pr_debug("perf_evlist__open: %s\n",
> >                        str_error_r(errno, sbuf, sizeof(sbuf)));
> > +             evlist__cancel_workload(evlist);
> >               goto out_delete_evlist;
> >       }
> >
> > @@ -149,6 +152,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
> >       if (err < 0) {
> >               pr_debug("evlist__mmap: %s\n",
> >                        str_error_r(errno, sbuf, sizeof(sbuf)));
> > +             evlist__cancel_workload(evlist);
> >               goto out_delete_evlist;
> >       }
> >
> > --
> > 2.51.0.rc2.233.g662b1ed5c5-goog
Re: [PATCH v1 2/4] perf test: Don't leak workload gopipe in PERF_RECORD_*
Posted by Arnaldo Carvalho de Melo 2 weeks, 2 days ago
On Tue, Sep 16, 2025 at 12:08:58PM -0700, Ian Rogers wrote:
> On Tue, Sep 16, 2025 at 12:04 PM Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
> > On Thu, Aug 21, 2025 at 03:18:32PM -0700, Ian Rogers wrote:
> > > The test starts a workload and then opens events. If the events fail
> > > to open, for example because of perf_event_paranoid, the gopipe of the
> > > workload is leaked and the file descriptor leak check fails when the
> > > test exits. To avoid this cancel the workload when opening the events
> > > fails.

> > > Before:
> > > ```
> > > $ perf test -vv 7
> > >   7: PERF_RECORD_* events & perf_sample fields:
> > > --- start ---

> > ⬢ [acme@toolbx perf-tools-next]$ patch -p1 < b
> > patching file tools/perf/tests/perf-record.c
> > Hunk #1 succeeded at 130 (offset 15 lines).
> > Hunk #2 succeeded at 142 with fuzz 1 (offset 15 lines).
> > Hunk #3 succeeded at 154 (offset 15 lines).
> > Hunk #4 succeeded at 167 (offset 15 lines).
> > ⬢ [acme@toolbx perf-tools-next]$
> > ⬢ [acme@toolbx perf-tools-next]$ git log --oneline -5 tools/perf/tests/perf-record.c
> > 576bd7a8c90c48e9 (x1/perf-tools-next, x1/HEAD, five/perf-tools-next, five/HEAD) perf tests record: Update testcase to fix usage of affinity for machines with #CPUs > 1K
> > b4c658d4d63d6149 perf target: Remove uid from target
> > dc6d2bc2d893a878 perf sample: Make user_regs and intr_regs optional
> > fd8d5a3b076c033f perf tests: Add missing event.h include
> > 9823147da6c893d9 perf tools: Move 'struct perf_sample' to a separate header file to disentangle headers
> > ⬢ [acme@toolbx perf-tools-next]$

> > Can you please check that it is still ok?

> > I processed the first in the series and now I'm going thru the other
> > two.
 
> Thanks Arnaldo! I'm not seeing the patch on:
> https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/log/?h=tmp.perf-tools-next

Sorry, I thought I had pushed it earlier, should be there now.

> I'm happy to check.

Thanks!

- Arnaldo
Re: [PATCH v1 2/4] perf test: Don't leak workload gopipe in PERF_RECORD_*
Posted by Ian Rogers 2 weeks, 1 day ago
On Tue, Sep 16, 2025 at 6:06 PM Arnaldo Carvalho de Melo
<acme@kernel.org> wrote:
>
> On Tue, Sep 16, 2025 at 12:08:58PM -0700, Ian Rogers wrote:
> > On Tue, Sep 16, 2025 at 12:04 PM Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
> > > On Thu, Aug 21, 2025 at 03:18:32PM -0700, Ian Rogers wrote:
> > > > The test starts a workload and then opens events. If the events fail
> > > > to open, for example because of perf_event_paranoid, the gopipe of the
> > > > workload is leaked and the file descriptor leak check fails when the
> > > > test exits. To avoid this cancel the workload when opening the events
> > > > fails.
>
> > > > Before:
> > > > ```
> > > > $ perf test -vv 7
> > > >   7: PERF_RECORD_* events & perf_sample fields:
> > > > --- start ---
>
> > > ⬢ [acme@toolbx perf-tools-next]$ patch -p1 < b
> > > patching file tools/perf/tests/perf-record.c
> > > Hunk #1 succeeded at 130 (offset 15 lines).
> > > Hunk #2 succeeded at 142 with fuzz 1 (offset 15 lines).
> > > Hunk #3 succeeded at 154 (offset 15 lines).
> > > Hunk #4 succeeded at 167 (offset 15 lines).
> > > ⬢ [acme@toolbx perf-tools-next]$
> > > ⬢ [acme@toolbx perf-tools-next]$ git log --oneline -5 tools/perf/tests/perf-record.c
> > > 576bd7a8c90c48e9 (x1/perf-tools-next, x1/HEAD, five/perf-tools-next, five/HEAD) perf tests record: Update testcase to fix usage of affinity for machines with #CPUs > 1K
> > > b4c658d4d63d6149 perf target: Remove uid from target
> > > dc6d2bc2d893a878 perf sample: Make user_regs and intr_regs optional
> > > fd8d5a3b076c033f perf tests: Add missing event.h include
> > > 9823147da6c893d9 perf tools: Move 'struct perf_sample' to a separate header file to disentangle headers
> > > ⬢ [acme@toolbx perf-tools-next]$
>
> > > Can you please check that it is still ok?
>
> > > I processed the first in the series and now I'm going thru the other
> > > two.
>
> > Thanks Arnaldo! I'm not seeing the patch on:
> > https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/log/?h=tmp.perf-tools-next
>
> Sorry, I thought I had pushed it earlier, should be there now.
>
> > I'm happy to check.
>
> Thanks!

Not seeing it, but I see the first patch. In any case I'll rebase and
send as a v2.

Thanks,
Ian

> - Arnaldo